Why Asian Chip Stocks Crashed: AI Bubble Fears, China Competition, and the KOSPI Circuit Breaker

Two of South Korea's largest companies were at the center of the storm:

• Samsung Electronics fell more than 11% .
• SK Hynix also dropped more than 11% .

Both companies are dominant players in the memory chip market, a segment that is critical to AI infrastructure and historically dominated by South Korean firms .

The Regional Contagion: Japan, Taiwan, and Beyond

The sell-off cascaded across Asia, hitting other major markets hard:

• Japan's Nikkei 225 fell about 4%, dragged down by its heavyweight semiconductor and chip-equipment stocks . The Nikkei closed at 62,351.73, down 3.97% .
• Taiwan and other regional markets also declined sharply, though the specific index figures vary by source .

Analysts described the sell-off as a regional rout, with losses spreading from Seoul to Tokyo to Taipei as investors reassessed the entire AI trade .

Three Broader Concerns Driving the Rout

Investors and analysts pointed to three specific, interconnected fears that triggered the crash.

1. AI "Circular Funding" and Bubble Fears

A major concern was the emergence of what analysts call "circular funding" in the AI industry. The term refers to financing arrangements where chipmakers like Nvidia lend money to AI startups, which then use that capital to purchase chips from the same lender . This creates a circular flow of capital that inflates demand signals without generating sustainable revenue from end customers.

Reports that Nvidia had structured large financing deals with AI startups reignited fears that the entire AI boom is overvalued . Investors worried that if this circular funding structure unwinds, demand for chips could collapse, leaving companies like Samsung and SK Hynix with massive overcapacity.

"The latest tremor in the A.I. market commenced on Monday when ChangXin Memory Technologies, China's foremost memory chip manufacturer, began trading following a remarkable initial public offering," reported The New York Times . The IPO itself signaled growing Chinese competition, but the circular funding news was the immediate catalyst.

2. China's Chip Breakthrough

The second major catalyst was a reported technology breakthrough in China that could boost its advanced chip-making capabilities. According to reports from The Information, China's Shanghai Yuliangsheng had begun mass production of advanced chip-making equipment . Additionally, reports emerged that Chinese companies were developing domestic deep ultraviolet (DUV) lithography equipment, a critical tool for manufacturing advanced semiconductors .

Han Ji-young, an analyst at Kiwoom Securities, said these reports "reignited concerns" about rising competition for established players like Samsung, SK Hynix, and TSMC, especially in the memory chip segment critical to AI .

The implication was clear: if China can produce its own advanced chips, the demand for chips from South Korean and Taiwanese manufacturers could decline, squeezing margins and profits .

3. Lofty Valuations and Financing Concerns

The third factor was the sheer height of semiconductor stock valuations. After a multi-year rally fueled by AI enthusiasm, chip stocks were trading at very high price-to-earnings multiples . Any hint of slowing demand, overcapacity, or tighter financing conditions for AI infrastructure projects was enough to trigger a sharp repricing.

"The selloff reflected a combination of concerns over AI infrastructure financing, China's technological advances and rising competition from Chinese firms," analysts told The Edge Malaysia . The market was essentially asking: can these companies justify their valuations if the AI boom slows, or if Chinese competitors eat into their market share?

What Happens Next?

The crash occurred during a packed week of market-moving events, including policy decisions from the Federal Reserve, the Bank of Japan, and the Bank of England, as well as earnings reports from several megacap technology companies . Investors will be looking for reassurance that the AI spending boom is sustainable and that the recent sell-off was an overreaction rather than a fundamental shift.

For now, the three fears that drove the rout—circular funding, Chinese competition, and lofty valuations—remain unresolved, suggesting that volatility in semiconductor stocks may persist.